Spectral and transport properties of the two-dimensional Lieb lattice
Spectral and transport properties of the two-dimensional Lieb lattice
The specific topology of the line-centered square lattice (known also as the Lieb lattice) induces remarkable spectral properties such as the macroscopically degenerated zero-energy flat band, the Dirac cone in the low-energy spectrum, and the peculiar Hofstadter-type spectrum in a magnetic field. We study here the properties of the finite …